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I run into a weird bug some weeks before after migrating our application from SUN JDK 1.4 on Linux to IBM JDK 5 on Linux. It turned out that when a class is being loaded, IBM JDK checks all it dependencies. This "features" broke our application since we were using a 3rd party jar that had missing classes.

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After a bit of additional testing, I was able to get an application to run under Tomcat.. But still no luck under Resin, which is what we normally run on. although Resin apps do seem to run as long as they don't use Spring. Even the basic app from the tutorial fails under Spring and Resin though, but works fine under Tomcat.

Yes, it looks like the problem is in IBM's JRE. Was hoping maybe there was some kind of work around.